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LEGUMINOS 4%. 119 
R. diversiloba T. & G. FI. i, 218. (Porson Oak). Stems erect and 
shrubby or climbing by rootlets attached to the bark of trees; 2—20 
feet high, usually somewhat pubescent: leaves usually 3-foliolate rarely 
5-foliolate; leaflets ovate, obovate or elliptical, 1—3 inches long, obtuse 
or acutish, 3-lobed or coarsely toothed, (rarely entire), the lobes and 
teeth rounded: panicles peduncled: flowers dioecious: fruit white, 
2—3 lines in diameter, falling soon after maturing. In forests and 
_ rocky hillsides, Brit. Columbia to California. 
* * Towers polygamo-dioecious, in short scaly-bracted spikes 
preceding the leaves. 
R. trilobata Nutt. T. & G. Fl. i, 219. A shrub 2—5 feet high, dif- 
_ fusely branched, more or less pubescent, at length nearly glabrous: 
leaves trifoliolate: leaflets sessile, cuneate-obovate or rhomboidal, 1—2 
inches long, coarsely toothed above and often 3-lobed, the segments 
obtuse: spikes of small yellowish flowers 4—6 lines long, approximate 
at the ends of the branchlets: fruit somewhat viscid, 2—3 lines in 
diameter, globose, bright red; nut smooth. On gravelly plains and 
hillsides, along streams, southern Oregon to California and the Rocky 
Mountains. | 
OrpER XXVI. “LEGUMINOSAE Beerh. Hor. Acad. ii, 22. 
Herbs shrubs or trees with alternate usually compound 
stipulate leaves, and usually showy flowers in axillary or termin- 
al racemes or spikes, rarely solitary or capitate. Sepals united 
into a 5-cleft or 5-toothed calvx, the lobes often unequal or 
variously combined, the odd oneinferior. Petals 5, sometimes 
by abortion fewer or wanting, perigynous or hypogynous, ir- 
regular and unequal, or sometimes regular, distinct or various- 
ly cohering, the odd one superior. Stamens mostly 10, diadel- 
-phous (9 and 1) or monadelphous, sometimes distinct or num- 
erous, inserted with the petals. Ovary simple. solitary, very 
rarely two or more, free from the calyx, the style protruding 
from the upper or ventral suture: stigma simple. Fruit a 1- 
celled 2-valved pod (legume), or sometimes a drupe. Seeds 
solitary or several, heterotropous or anatropous, sometimes 
with an aril or large caruncle: albumen none. Embryo straight 
or with the radicle bent back along the edge of the:cotyledons. 
Cotyledons thin and somewhat foliaceous, or thick sab fleshy. 
Ours are all of | 
SUBORDER PAPILIONACEaA LL. Sepals imbricate or rarely 
somewhat valvate in the bud. Corolla papilionaceous or other- 
wise more or less irregular, rarely wanting Stamens 10, rarely 
fewer, inserted with the petals into the bottom of the calyx, or 
perigynous. Radicle bent back upon the edge of the cotyledons, 
or straight. Leaves simple or simply compound. Flowers usu- 
ally perfect. 4 
TRIBE I. PODALYRIE. Herbaceous or suffrutescent. plants with 
palmate, or pinnate or simple leaves and papilionaceous flowers: 
Stamens 10, distinct; anthers uniform. Embryo incurved or 
inflexed, or often straight. | 
1. Thermopsis. Herbs with conspicuous stipules, digitately trifoliolate 
